body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
    text-align: center;
}

header {
    background-color: #2C88D9;
    color: #fff;
    padding: 20px;
}

h1 {
    margin: 0;
}

footer {
    display: flex;
    justify-content: space-around;
    text-align: center;
    width: 80%;
    height: 100%;
    background-color: #fff;
    margin: 20px auto auto;
    padding: 30px;
    border-radius: 20px;
    align-items: flex-start;
}

footer .touxiang {
    width: 200px;
    height: 300px;
}

.info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    height: 100%;
}
.info .item {
    display: flex;
    margin: 10px 40px;
    width: 90%;
    justify-content: space-between;
    text-align: left;
}

.book_name {
    margin-left: 40px;
    font-size: 30px;
}

.line {
    display: flex;
    margin-left: 40px;
    width: 100%;
    justify-content: space-around;
}

.inventory {
    justify-content: space-between;
}

button {
    align-self: center;
    padding: 5px 10px;
    background-color: #2C88D9;
    color: #fff;
    border: none;
    border-radius: 10px;
    width: 20%;
    margin-top: 20px;
}

button:hover {
    background-color: #677794;
}